Lead-packed anchor-bolt.



' G. E, ROHMER. LEAD PACKED ANCHOR BOLT.

APPLICATION FILED APR. 26, 1910.

' 977,402- PatentedNov. 29, 1910.

err

T 0 aZZ whom it may concern.-

Be it known that I, GABRIEL E. Bonanza, a citizen of the United States, residing at )Voodside, in the county of Queens and State of Xew York, have invented a new and use- .ful Lead-Packed Anchor-Bolt, of which the following is a specification.

My invention relates to improvements in lead packed anchor bolt, bywhich the bolt is anchored into a foundation or stone hole in a more rational and theoretical way than it is done now, thus doing away with the old style bolt lead packing, which consist in filling up and packing with sheet lead the open space left all around a bolt placed in a hole into which it has to be anchored.

I attain this object by the device illustrated in the accompanying drawings in which Figure 1, is an illustration showing how a bolt is anchored in a hole by the use of the present invention. Fig. 2, is a longitudinal section of the bolt and anchor device and Fig. 3, an end elevation. Fig. 4, illustrates a tool used for packing purposes.

Similar letters refer to similar parts throughout the several views.

The anchor bolt device of the present invention is composed, of three essential parts as illustrated in Fig. 2-the bolt itself A,

the collar B and the anchor washer C. The bolt A, (Figs. 1, and 3) is an ordinary bolt of any size as commonly supplied by the trade, but generally with a square head as bolts with such heads are almost exclusively used in foundation work. The collar B (Fig. 2) is made of lead or any other soft metal, of an appropriate thickness and with the inside hole of a diameter slightly larger than the diameter of the bolt A. An end of this collar is beveled as shown by letter d, Figs. .1 and 2, this bevel making with the center-of hole e f, Fig. 2, (this center being also the center of the bolt A) an angle 6, g, it, slightly larger than 30 (same figure). The

other end of the collar is plain like a buslr ing and its length is about equal to the diameter of the bolt used. But this length can be changed according to the depth of the hole into which the bolt has to be anchored.

The anchor washer (Figs. 2 and 3) is the most important part of this device and is also made of lead; Its shape being that of two truncated cones whose bases would be coincident on line 2' 9' (see F ig. 2). The diameter of the hole in this anchor washer Specification of Letters Patent.

Application filed April 1910.

Ts Fines.

GABRIEL E. ROHMEB, OF WOQDSIDE, NEW YORK.

Serial No. 557,725.

C, Fig. 2, is of a few thousandths of an inch larger than the diameter of the bolt i A; the bolt fitting therein by a: push fit. As illustrated by letter is, Fig. 2, the an} chor washer hole runs straight, a short distance and corresponds to the size of the bolt A. Then it spreads open tobe a countersunk hole Z, of an outside diameter m, equal to the outside diameter of the collar B. (Fig. 2.) The periphery p of the countersunk hole Z makes with the center e, f of the anchor washer an angle 0, 24,6, equal to 30 (Fig. 2.) The outside diameter of the anchor Washer C (Fig. 2) taken at line i j is which the anchor bolt has to be set. The

conditions governing the size of that out side diameter will be set forth hereafter.

As-illustrated in Figs. land 2, it will be seen that the truncated cone edge a, of the anchor Washer Fig. 2, makes with the bevel hole Z, peripherical side p, an angle 9, I

r, it slightly less than 90; the angle 8, r, 24

being a right angle. It will also be noticed that the other side of this anchor WRShGIT'O,

Fig: 2,'is cast with a ridge t.

The object and use of the dilterent angles g, r, a and a, 1 11., as well as of the circum ferential ridge t, Fig. 2, will be set forth 1n the following explanation of how to set this anchor bolt into a foundation hole and Why it holds on.

To anchor a bolt of this system into'a con- I crete hole G (for instance) it is first necessary to have an iron bar of a square or round section, small enough to Work freely between the bolt A (Fig. 1) and the inside periphery of the hole. But a tool I), with a concave blade E, as illustrated in Fig. 4, and having a handle F (same figure) of a length to suit the depth of the concrete hole would certainly give the best results.

The bolt A, Fig. 1, onto which the collar B has been slipped is dropped into the con crete hole G, the head resting upon the bottom of the hole. The plain end of the collar 13 (Fig. 1) rests on the bolt head while its beveled end (Z, stands ready to receive the anchor washer C, (Figsl and 2.) The anchor washer has an outside diameter larger than the diameter of the concrete hole G, Fig. 1. The size of this diameter will be determined by experiments, but must be such as to necessitate the use of a hammer and of the tool I), to drive the anchor washer G, into the hole G, (Fig. 1.). Pre- Patented Nov. 29, 1910.

paratory to driving the anchor Washer into the hole, it must be placed in such a Way as to have its countersunk hole Z, (Fig. 52) when driven down the concrete hole to fit exactly orcr the beveled end LZ of the collar B, (Fig. 1)

As mentioned before, the bevel edge of collar B,,'mal:es with the center or the bolt an angle 'e, g, h, largerithan the 30 angle 0, u, e, of the anchor washer C, (see Fig. 2.) This angle causes the beveled edge d, of collar B to act as a wedge, collapse (on account; of the softness of the metal of which it is made) draw tightly all around the bolt A, (see 7), Fi 1.) A per :lectseatfor the anchor washer C, is thus obtained, that seat making an angle of 30 'ith the center of the bolt 21. see Figs 1 and By driving the anchor Wflihlel C into the concrete hole G, (Fig. l) the opening of the angle- 1', r, 2/, hi 2, is a good deal less- Iened owing to the inalleabilityof the lead;

which causes the anchor washer C to. draw closer to the center of the bolt .95., (Fig. Now, if, vith the tool D, Fig. 1, the circumferential ridge t, Fig. 2, is hammered down against the periphery of hole G, Fig. 1, the

angle q, r, '21, (Fig. 2) is increased again close to 90. It will be readily understood that by a careful hannnering of the ridge t, Fig. 2, a ncrfect packing of the anchor .washer C Fi 1, will be obtained as the metal will draw back all around the bolt on the bevel seat made-by the collar Bf -As that collar bevel seat makes, with the center of the bolt, an angle of 80 and as the anchor washer in crawing back makes with the collar bevel seat an angle closeto all around the bolt, this device offers a per feet and theoretical truss line to resistany force exertcdon the bolt to pull it out of the hole. v

The collar B and anchor Washer C, be-

' Q earners the secoi :l, B and C the third and and. r

C, the fourth unit see Fig. '1).

bol into foundation has a Wide scope and W11 bolts and the old style ,lead packing were used before. 1 also do not limit myself to the kindot metal of which the collar and anchor Washer can be made, but it appears to zne that a soft metal should give the best results.

I claim. 1 r

1. An anchor bolt, con'iprising a bolt, a soft metal collar beveled on one end and loosely surrounding said bolt, an integral soft metal Washer in the form of two truncated cones placed base to. base cont-act ing with the aforesaid collar; thereby constituting an anchorage unit substantially as described.

In combination, a bolt, a collar surrounding said bolt having one end plane and the other end beveled, a Washer in the form of truncated cones secured at their bases contacting with said collar, said bolt by means of its head iorn'iing a. stop for the collar, the other end of the bolt being thread ed and provided With an adjusting nut, substantially as described.

In testimonmiller-cot. l have si 'ned 111" name to this specification in the presence of two subscribing witnesses.

GABRIEL ROHMER.

I ll itnesses: v

ACHILLE PAILLOL, BERTHE ROHMEB.

The application of this mode of anchoring L 1. be readily employed Where expansion. 

